Improvement in lamp-globes



H. E. BUTLER. Lamp-Globe.

No. 214.238. Patented April 15, I879.

X f I 7 G? figitmssrs gnhmtur y w l ATTORNEY.

UNITED S TATES PATENT OFFICE HIRAM E. BUTLER, OF PHILADELPHIA,PENNSYLVANIA, ASSIGNOR TO L. CASE AND A. REX, OF SAME PLACE, ONE-FOURTHTO EACH.

IMPROVEMENT IN LAM P-GLO BES.

i9 Specification forming part of Letters Patent No. 214,238, dated April15, 1879; application filed March 30, 1878.

To all whom it may concern:

Be it known that I, HIRAM E. BUTLER, of the city and county ofPhiladelphia, and State of Pennsylvania, have invented a new and usefulImprovement in Lamp Shades or Globes, which improvement is fully setforth in the following specification and accompanying drawing, in whichthe figure is a central vertical section.

My invention relates to chimneyless-lamp globes; and consists in certainimprovements therein, as hereinafter more fully set forth.

In the accompanying drawing, A represents a hemispherical transparentbody surrounding the burner B and supported on the body of the lamp, onthe upper edge of which hemisphere A rests the horizontal flange a, ofthe hemisphere (J, of the same curvature as A, and having the verticalflange a projecting downward into the hemisphere A, leaving a slightannular space between them to allow for expansion and contraction.

The upper end of the hemisphere O is provided with a rim, 0, having aflaring mouth, m. The lower end or base of the rim 0, at its junctionwith the hemisphere G, is contracted, and an annular flange, n, isformed at its base.

The operation of the chimneyless-lamp globe is as follows: The productsof combustion will mainly ascend from the bunner in vertical lines, asshown by the arrows b c 01, out through the central portion of the rim0. A portion of the products of combustion will pass around the interiorof the globe, between the vertical ascending column above described andthe interior spherical face of the globe, until in ascending they reachthe projecting flange n, which will deflect them downwardly, as shown bythe arrows 0 into the currents of cold air a entering the rim 0, bywhich they are carried, as shown by the arrows 0, down to the burner B,where they will be consumed. The currents of cold air 0 will act thus asvehicles to carry back the unconsumed products of combustion to theburner, and will also supply an additional amount of oxygen to theburner from that derived from below the burner, thus increasing thelight and obviating the use of a chimney.

I claim as new and of my invention- The lamp-globe herein described,consisting of the two transparent hemispherical bodies A O, of the samecurvature, the top hemisphere, G, having a vertical rim, 0, with aflaring mouth, m, and a contracted throat, with a flange, n, at itslower end, whereby the products of combustion near the interior face ofthe globe are deflected and returned to the burner by currents of coldair, substantially as described.

H. E. BUTLER.

Witnesses:

JOHN A. WIEDERSHETM, H. E. GARsED.

